In Philadelphia, if a student chooses not to attend their neighborhood school, other options include schools with specialized programming in the arts, sciences, or business fields, schools with career and technical education options, and competitive magnet schools. But choosing an out-of-catchment school rather than a neighborhood school may require a longer or more complicated commute, particularly for students relying on public transit to get to school. Research has shown that commute time and complexity can influence attendance, academic achievement, engagement in school, and health factors associated with sleep. This report uses School District of Philadelphia high school student enrollment and residence data to estimate student commutes to all 52 traditional district high schools via public transit. Transit data from the 2017-18 school year was estimated how long it would take for high schoolers to get to school using public transit based on where they live and under optimal conditions (i.e., no delays and use of all available routes). Also analyzed was how estimated commutes vary by type of school admission (i.e., Neighborhood, Citywide, or Special Admission) and student residential neighborhood (defined as the City Council District in which they live). The findings of this study, can help guide families and students to consider commute time and complexity when selecting schools. The authors also anticipate that the analysis of variation in commutes may be useful for policy makers at the School District of Philadelphia (SDP) and its School Board, City Council, and Southeastern Pennsylvania Transportation Authority (SEPTA) (Philadelphia's transit authority) as they make ongoing decisions about system-wide school offerings, start times and scheduling options, and transit networks. Four appendices are included in this report. [This is Brief 2 of the Back to School series. For Brief 1, "Strategies for Reducing Student Absenteeism in Philadelphia," see ED608079.]